Warp stop-motion for looms.



PATENTED AUG. 28, 1906.

A. MANN. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED SEPTLlfi. 1905.

\NYENTOR E BY 6/14 ATTORNEY 1 A z lllLl lP. p 1

WITNESSES:

"shipper-lever 4. ergized, the dagger 12 is moved into posltlon to be impingedlupon by a bunter 14, mount UNITED STATES PALIEN T OFFICE.

ALBERT MANN, OF

OF NEW YORK.

BRIDGEPORT. CONNECTICUT, ASSIGNOR TO KIP- ARMSTRONG COMPANY, OF NEIV YORK,

N. Y., A CORPORATION Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed September 15, 1905. Serial No. 278.555.

To all whom, it may concern:

Be it known that I, ALBERT MANN, a citizen of the United States, and a resident of the city of Bridgeport, State of Connecticut, have invented certain new and useful Improvements in Warp Stop-Motions for Looms, of which the following is a specification- The present invention relates to a warp stop-motion for looms, and more particularly to a form of terminal included in the controlling-circuit.

The object of the invention is to provide a terminal in which the annoyances and dangers due to the accumulation of lint shall be reduced to a minimum, particularly in such cases where it is desired to provide a contact below the Warp. V

This and other features of the invention will be understood by reference to the accompanying drawin s, in which 7 Figure 1 is a side elevation of a loom, showmg the ap lication of the invention thereto. Fig. 2 is a gent elevation OJ. the left-hand end of the breast-beam; Fig. 3, a side view of a drop device with my improved terminal in vertical section Figs. 4, 5, 6, and 7, similar views showing modified forms of terminal.

Similar reference-numerals indicate similar parts in the several views.

Referring to the drawings, 1 designates the frame of the loom 2, the lay; 3, the breastbeam; 4, the shipper-lever; 5, the warps; 6, the war -beam; 7, the reed, and 8 the heddl'es. hese parts may be and are of the usual construction and arrangement in looms. The shipper-lever, as usual, occupies a slot in a bracket forming an extension of the breast-beam and engages a shoulder when the loom is running. When freed from this shoulder, a spring shifts said lever to stop the loom, all as will be readily understood. In order to set the shipper-lever free, an electromagnet 9 is mounted below the breast-beam on a bracket, and its armature-lever 10 is connected rod 11 to one end of a dagger 12. Pivotally supported by pins or studs in a bracket secured to the loom-frame is a knock-off lever 13, attached at its lower end to the dagger 12, and its upper end adapted to engage the When the magnet 9 is en- 'ing part of the loom. Th

by a link or Wire= ed on the lay or some other vibrating or mov e impingement of e bunter on the dagger moves the knockolf lever to free the shipper-lever, as will be readily understood.

In order to energize the el'ectromagnet 9, and thus set in motion the loom-stopping devices whenever a Warp-thread breaks or becomes unduly slack, a controlling-circuit 15 is employed. This circuit includes the coils of said magnet and a battery or other source of current 16, the circuit-terminals and circuit-closing devices being situated at the point 17.

In this general class of stop-motions a thin metallic drop is suspended from each warpthread, and these drops, as heretofore constructed and arranged, inclose what has been called a compound terminal, consisting of a bar electrically connected to one of the lead-wires from the battery or other source of current and a blade set into, but insulated from, said bar and electrically connected to the other lead-Wire. The drops are at all times or normally in contact with said bar and held out of contact with the blade by the tension of the warp-threads. When a warpthread breaks or becomes unduly slack, the

drop suspended thereon falls and closes the controllin -circuit by contact with the terminal blade, thus ener izing the magnet and setting in operation t e stopping mechanism. form of compound terminal and will now be described.

Referring to Fig. 3, 18 designates a metallic drop having an open-ended slot 19, so as to provide two depending legs 20. The compound terminal comprises a bar 21, of any suitable conductive material, which extends across the loom and is supported at its ends on the framev and is insulated there- The present invention relates to the from. Said bar is electrically connected to one of the lead-wires of the battery and constitutes, therefore, one of the battery-terminals. The bar 21 is of such Width that when the drops are normally suspended the legs 20 will embrace manner shown, the latter thus serving as a guide for the drops with which they are in constant contact. The lower edge of the bar 21 is grooved, and set into insulation 24 in said bar in substantially the I 1 the groove, as shown,'is a blade22, of con ,1

1 lower edge 23 of ductive material, preferably which is electrically connected to the other lead-wire and constitutes, therefore, the other terminal of the circuit. The blade 22 extends across the loom and projects laterally at such an angle to the side of the bar 21 as to lie in the path of a falling drop, the movement of such drop being arrested when it contacts with the blade, thus closing the circuit. The normal tension of the warpthreads is sufficient to and out of contact with the blade. The blade 22 may extend at an obtuse angle to the plane of the side of the bar 21, as shown in Figs. 3 and 4, or it may be at right angles thereto, as shown in Fig. 5, or even at an acute angle, as shown in Fig. 6. If set at an acute or'obtuse angle, I prefer to incline the the leg of the drop which contacts therewith at a corresponding angle, so as to insure good electrical contact by a shearing action when a drop falls. This, however, is not absolutely essential, as the sheet-copper, i way of supporting the blade hold the drops above lower contacting edge of the drop may be in Fig.

squared, as shown in Figs. 4 and 5.

' In Figs. 3 to 6 I have shown but one blade 22, although, if desired, two such blades may be employed,-preferably arranged as shown 7. The warp may be threaded through the slot 19 so as to rest against the upper wall thereof, as indicated in Fig. 3, or the drops may be provided with thread-apertures 25, as indicated in Figs. 5 and 6. With the present form of drop and compound terminal the accumulation of lint in the slot 19 is not of serious moment so long as it does not accumulate'in sufficient quantity to clog and prevent the drop when falling to contact with the blade 22, and in practice it has been found that with this form the cleaning of the drops is not required except at comparatively long intervals. Furthermore, it has been found that lint does not collect to any appreciable extenton the blade 22, especially when the latter is inclined at an obtuse angle, as in Figs. 3 and 4, and a comparatively clean surface is presented to receive a falling drop, the impact of the latter being sufficient to scrape off any lint that may be present. Moreover, in the present arrangement the blade 22 is easyof access and may be readily cleaned by simply. passing a cloth over its surface. These features are of advantage in that they provide an arrangement that is feasible for use when it is desirable to have the contact below the warp. A convenient way to construct the compound terminal is to split the lower edge of the bar 21 and set the blade 22 therein, the insulation 24 being preferably wrapped around the upper edge of said blade. Then by hammering the bar 21 the split ends will be brought together so as to compress them about the inserted edge of the blade 22.

However, any other suitable.

may be resorted to.

WVhile I have shown the blade 22 set in the lower edge of the bar 21, I do not desire to be limited to that exact construction, as it is obvious that the blade may be set into the side of the bar so as to project therefrom, the essential feature being that the blade shall project in such manner as to lie in the path of a falling drop. The circuit 15 also includes, a switch 26, of any usual or wellknown type, having contact-plates by which the circuit may be opened'or closed. As here shown, the switch is supported on a bracket and is provided with a switch-lever 27 in contact with and adapted to be moved by a projecting arm 28, secured to the shipper-lever. During the normal operation of the loom the circuit is closed through the switch 26 and at all other points except through the compound terminal at 17. When the circuit isclosed at the compound terminal, the shipper-lever is released as above described 'to stop the loom, and as said lever is shifted the switch-lever 27 is moved so as to immediately after the loom has been stopped break the circuit through switch 26. When the loom is again set in motion, the break in the circuit at the switch 26 will be closed.

What I claim, and desire to secure by Letters Patent, is-

1. A compound terminal for use on looms comprising a bar and a blade 'set into said bar and insulated therefrom, said'blade projecting at an angle to the plane of the side of the bar.

2. A compound terminal for use on looms comprising a bar and a blade set into said bar and insulated therefrom, said blade projectin at 'an obtuse angle to the plane of the side of the bar. p

3. A warp stop-motion for looms comprising drop devices having open-ended slots and adapted to be maintained in normal position by warpthreads, and a circuit-terminal consisting of a bar adapted to enter serve as a guide for the drops, and a blade secured to and insulated from said bar, said blade projecting from said bar so as to lie in the path of a falling drop.

4. A warp stop-motion for looms comprising drop devices having open-ended slots in the lower part thereof and adapted to be maintained in normal position by warpthreads, a compound circuit-terminal consisting of a bar adapted ,to enter said slots and with which said drops are in constant contact, and a blade secured to and insulated from said bar, said blade projecting from said bar below the normal position of the drops.

5. In a warp stop-motion for looms the combination of a controlling-circuit for setting in operation the stopping mechanism,

IIO

said slots to drop devices maintained in normal position by Warp-threads, a compound terminal for said circuit consisting of a bar with which said drops are in constant contact, and a blade set into said bar and insulated therefrom, said blade projecting at an angle to the side of the bar so as to lie in the path of a falling drop.

6..In a Warp stop-motion for looms the combination of a controlling-circuit for setting in operation the stopping mechanism, drop devices maintained in normal position by warp-threads, said drops consisting of metallic strips formed With an open-ended slot, a circuit-terminal consisting of a bar I 5 adapted to enter said slots and serve as a guide for the drops, and a blade secured to and insulated from said bar, said blade projecting from said bar below the normal position of the drops so as to arrest a falling drop 20 and thereby close the circuit.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

ALBERT MANN.

Witnesses:

L. E. HEBBARD, A. OAKLEY. 

